In this week's spotlight: a pair of physics science projects that invite students and families to explore the granularity of materials. Can you pour candy in a way that is similar to pouring water? What determines whether or not a material can "flow" in this way? Which variables affect how smoothly the material flows? With your Halloween candy bag at hand, you can put it to the test with your own "candy waterfall" in these hands-on science project and family science activities.

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